Baby Toolkit has a great method for silencing people who keep calling your cellphone and can never seem to get it into their head that there is no “Maria” at this number and there never will be. Create a contact called “Wrong Number” and change its ring settings so the ringer is silenced. Whenever a wrong number calls, add it to the contact. Boom, saves you cellphone minutes, aggravation, and the time it takes to dig through everything to find the phone only to find out it’s for Maria, again.
Hack Your Cell: Identify Regular Wrong Number Callers [Baby Toolkit via Lifehacker]